In 2366, Starfleet Lieutenant Worf was brought to the Great Hall of the Klingon High Council to face discommendation in light of evidence that his father was responsible for the Khitomer Massacre of 2346. (TNG: "Sins of the Father")
In 2367, Captain Picard completed the Rite of Succession at the Great Hall when he named Gowron as the next chancellor of the Klingon Empire despite the efforts of the Duras sisters Lursa and B'Etor. (TNG: "Redemption")
Great Hall of Qam-Chee Edit
The ancient Klingon city of Qam-Chee also contained a great hall which was the site of Kahless and Lukara's marriage, and a subsequent attack by forces loyal to Molor. (DS9: "Looking for par'Mach in All the Wrong Places")
The design of the Klingon Great Hall (and other sets in "Sins of the Father") won an Emmy Award for Best Art Direction for Star Trek: The Next Generation production designer Richard James and TNG set decorator Jim Mees. The latter production staffer later recalled, "We created the [...] set at a time when the TNG production team was still formulating who the Klingons really were. The beautiful part of this process is that the writers gave us the parameters of the story, and let Richard and me take it from there." (Star Trek: Communicator issue 152, p. 32)
The Great Hall interior set was built on Paramount Stage 16.